I implemented something in VisualWorks (another Smalltalk dialect) that 
did this. It uses a hook in the system to know when source code for a 
class or a method is retrieved. When this happens, I inspect the stack 
to find out which tool the user is using (so that I know whether they 
changed browsers etc.), and log this in a big dictionary (including 
time stamps etc.).

More information and downloads can be found at the SmallBrother page: 
http://www.iam.unibe.ch/~wuyts/SmallBrother/index.html .

I am currently implementing part of this system for Squeak (see the 
threads on SystemChangeNotification), but only the part that deals with 
changes to the system. So you'd have to find the place in Squeak where 
source code of methods and classes is retrieved to put a hook there. 
Depending on where this happens, it can be as simple as overriding a 
method on the class side of object (meaning that you do not have to 
make destructive modifications to core system methods), etc. I have no 
idea how fluent you are in Smalltalk, so tell me whether this 
explanation makes any sense to you :-) I implemented such systems in 
some other dialects as well, so I can give you a hand if you do not 
feel up to this task :-)

On Monday, Jul 14, 2003, at 13:41 Europe/Zurich, Bilal Ahmed wrote:

> Hi,
> Is anyone aware of ways to evaluate user interfaces and do ethnographic
> data collection in Squeak? I would ideally like to give an application 
> to
> a user and somehow collect data on how the user found his/her way 
> around
> the application (things like reaction times, etc).
> Thanks,
> Bilal
>
>
Roel Wuyts                                                   Software 
Composition Group
roel.wuyts at iam.unibe.ch                       University of Bern, 
Switzerland
http://www.iam.unibe.ch/~wuyts/
Board Member of the European Smalltalk User Group: www.esug.org